Replacing a damaged copy of SpamSieve

I just received a screen message that my copy is damaged and I need to download a fresh copy. Where do I find that? All I see is a “free trial” or “purchase” option. I am using 2.9.20

The “Download (Free Trial)” button is what you want. Or you may be able to have SpamSieve reinstall itself, as described in the Reinstalling a Fresh Copy section of the manual.